read.c
1.14 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
/**
* \file
*
* \author Georg Hopp
*
* \copyright
* Copyright © 2014 Georg Hopp
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <sys/types.h>
#include <unistd.h>
#include <errno.h>
#include "trio.h"
#include "tr/cbuf.h"
ssize_t
TR_cbufRead(TR_Cbuf this, TR_Stream st)
{
size_t rsize = TR_cbufGetFree(this);
ssize_t rrsize;
if (0 == rsize) {
errno = TR_ECBUFOVFL;
return -1;
}
rrsize = TR_streamRead(st, TR_cbufGetWrite(this), rsize);
if (0 < rrsize) {
TR_cbufIncWrite(this, rrsize);
}
return rrsize;
}
// vim: set ts=4 sw=4: